jeffrey brown has our story. >> brown: senate democrats had cause to celebrate last night and again today, when the last two races were called. montana senator jon tester kept his seat after a tough re- election fight and heidi heitkamp emerged the victor in a closrace in north dakota. as a result, democrats will hold 53 seats in the new senate that convenes in january-- a gain of two. republicans will have 45. two seats will be filled by independents, and at least one of them will caucus with democrats. many of the democrats' big wins were by women. elizabeth warren unseated incumbent republican scott brown in massachusetts. >> you took on the powerful wall street banks and special interests and you let them know you want a senator who will be out there fighting for the middle class all of the time. >> brown: in missouri, senator claire mccaskill had been on the endangered list, before her republican opponent made damaging comments about rape and abortion. >> with a stubborn determination, tenacity and a refusal to give up we showed the country what missouri is made of. >> brown: and in